Compare / head-to-head
Claude Opus 5.5vs
GPT-6 Sol
Claude Opus 5.5 leads 1 of 1 shared benchmark. GPT-6 Sol is 2x cheaper per token. GPT-6 Sol has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
Claude Opus 5.5 leads
Cheaper per token
GPT-6 Sol
2x cheaper, input + output
Larger context
GPT-6 Sol
1.1M tokens
Providers
2 providers
Anthropic · OpenAI
Claude Opus 5.5
Anthropic · released 2026-09-22
textvision
Quality
Benchmark matrix
1 shared · 8 only Claude Opus 5.5 · 3 only GPT-6 Sol| Benchmark | Claude Opus 5.5 | GPT-6 Sol | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| AutomationBench 1.0.6 | 40% ↗ | 33.2% ↗ | +6.8 pt | Claude Opus 5.5 |
| Only Claude Opus 5.5 reports · 8 | ||||
| Chartography (with tools) | 89% ↗ | not reported | — | — |
| CursorBench 4.0 | 57.8% ↗ | not reported | — | — |
| FrontierCode v1.1 (Main) | 54.4% ↗ | not reported | — | — |
| GDPval-AA v2.1 | 1846 ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 67.7% ↗ | not reported | — | — |
| OSWorld 2.0 (partial) | 81.8% ↗ | not reported | — | — |
| Terminal-Bench 4.0 | 66.4% ↗ | not reported | — | — |
| Terminal-Bench Science 0.1 | 58.7% ↗ | not reported | — | — |
| Only GPT-6 Sol reports · 3 | ||||
| Agents' Last Exam V1 | not reported | 56.4% ↗ | — | — |
| DeepSWE v1.1 | not reported | 68.8% ↗ | — | — |
| OSWorld 2.0 (offline, partial) | not reported | 60.5% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Opus 5.5 minus GPT-6 Sol in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Opus 5.5 | GPT-6 Sol | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1.1M tokens | GPT-6 Sol |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $4 ↗ | $2 ↗ | GPT-6 Sol |
| Output price / 1M | $20 ↗ | $10 ↗ | GPT-6 Sol |
| Cached input / 1M | $0.2 ↗ | $0.2 ↗ | Tie |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $24 | $12 | GPT-6 Sol |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-22 | 2026-09-22 | — |
| Cited benchmark scores | 9 | 4 | — |
Reliability
Provider status
Live from /statusMore matchups
Claude Opus 5.5 vs …
Models sharing the most benchmarksMore matchups
GPT-6 Sol vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 5.5 and GPT-6 Sol on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.